on Do not expect to find the group it self listed or oth er wise identified

on Do not ex pect to find the group it self listed or oth er wise iden ti fied, how ever


You have to ac tu ally know the ex act dif fer ences be tween the three groups, and that is the sub ject


briefly re vis ited in this chap ter


147


Copyright 2005, busbar bending machine Industrial Press Inc, New York, NY – FANUC CNC Custom Macros


148


Chapter 11


drilling Machine


Tool Offset Memory Groups


The mem ory reg is ters that store the tool off sets de pend on the model of the con trol, and its type


( mill ing or turn ing) Pro gram mers should al ways know which mem ory type is avail able on each


Fanuc con trol in the ma chine shop There are three groups for the mill ing con trols, and are iden ti –


fied by the cap i tal let ters A, B, and C There are two groups for the turn ing con trols, and are iden –


ti fied by the cap i tal let ters A, and B An ear lier Chap ter 5 dealt with the sub ject of Data Set ting – it de scribed the ap pear ance of each off set group on the con trol dis play cnc equipment screen (CRT) Re view ing the


three main types used for the mill ing con trols (usu ally only one type ap plies to lathes), will help to


con sider them in the con text of the sys tem vari ables used in mac ros


Tool Offset Memory – Type A


This low est level group is also known as the shared off set group It can be rec og nized it by its


sim plic ity There is only a sin gle col umn avail able in the angle shearing machine con trol sys tem to en ter both the tool


length off set val ues and the cut ter ra dius off set val ues That means the tool off set for the length is


stored in the same reg is try area of the con trol as the tool off set for the ra dius If a par tic u lar tool re quires both off sets in the same pro gram, a dis tinc tion be tween them must include dif fer ent off set


num bers The same reg is try area shares both types of off sets For ex am ple:


(TOOL 04 ACTIVE)


G43 Z20 H04


Uses tool length offset 04


(H04)


G01 G41 X500 D34


Uses cutter radius offset 34


(D34)


On some ma chines, the D-offset can not be used, and the H-offset must be used

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